$headerHeight: 40px
$nvaWidth: 200px
.scroll
    -webkit-overflow-scrolling: touch
    overflow-x: hidden
    overflow-y: auto
    &::-webkit-scrollbar
        width: 0
        height: 0
.header,.nav,.iframe
    position: fixed
.header
    height: $headerHeight
    width: 100%
    top: 0
    left: 0
    right: 0
    background: #00b3ee
    color: white
    line-height: $headerHeight
    text-align: center
.nav
    @extend .scroll
    left: 0
    top: $headerHeight
    bottom: 0
    width: $nvaWidth
    background: #0b97c4
    color: #fff

.iframe
    @extend .scroll
    right: 0
    bottom: 0
    top: $headerHeight
    left: $nvaWidth
    padding: 20px
.alertMessage
    position: fixed
    top: $headerHeight+30px
    right: 30px
    width: 400px
    z-index: 99999